Which alphabet letter is a question?

Can you count the number of matches in the picture below ?

Can you place six X (crosses) in below board without making three in a row in any way ?

A sundial has the fewest moving parts of any timepiece. Which has the most?

My friends called me Iron59 because my parents are a chemist and a mathematician. What is my real name?

John replied, when asked how old he was. In 2 years he will be twice as old as he was five years ago.' How old is he ?

There's one "sport" in which neither the spectators nor the participants know the score or the leader until the contest ends.

What is it?

John is the son of Jacob.
So,
Jacob is the_____of John's father?

Create a number using only the digits 4,4,3,3,2,2,1 and 1. So i can only be eight digits. You have to make sure the ones are separated by one digit, the twos are separated by two digits the threes are separated with three digits and the fours are separated by four digits

Can you find the thief by just looking at the picture below?